A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable to land troops directly on shore, typically loading and unloading at a seaport or onto smaller vessels, either tenders or barges.
Attack transports,[1] a variant of ocean-going troopship adapted to transporting invasion forces ashore, carry their own fleet of landing craft. Landing ships beach themselves and bring their troops directly ashore.
History
Ships to transport troops were used in antiquity. Ancient Rome used the navis lusoria, a small vessel powered by rowers and sail, to move soldiers on the Rhine and Danube.[2]
Nicknamed the "Grey Ghost", RMSQueen Mary holds the all-time record for most troops on one passage, 15,740 on a late July 1943 run from the U.S. to Europe.
The modern troopship has as long a history as passenger ships do, as most maritime nations enlisted their support in military operations (either by leasing the vessels or by impressing them into service) when their normal naval forces were deemed insufficient for the task. In the 19th century, navies frequently chartered civilian ocean liners, and from the start of the 20th century painted them gray and added a degree of armament; their speed, originally intended to minimize passage time for civilian user, proved valuable for outrunning submarines and enemy cruisers in war. HMTOlympic even rammed and sank a U-boat during one of its wartime crossings. Individual liners capable of exceptionally high speed transited without escorts; smaller or older liners with poorer performance were protected by operating in convoys.
Most major naval powers in the late 19th and early 20th centuries provided their domestic shipping lines with subsidies to build fast ocean liners capable of conversions to auxiliary cruisers during wartime. The British government, for example, aided both Cunard and the White Star Line in constructing the liners RMSMauretania, RMSAquitania, RMSOlympic and RMS Britannic. However, when the vulnerability of these ships to return fire was realized during World War I most were used instead as troopships or hospital ships.
RMSQueen Mary and RMSQueen Elizabeth were two of the most famous converted liners of World War II. When they were fully converted, each could carry well over 10,000 troops per trip. Queen Mary holds the all-time record, with 15,740 troops on a single passage in late July 1943,[3] transporting a staggering 765,429 military personnel during the war.[3]
Large numbers of troopships were employed during World War II, including 220 "Limited Capacity" Liberty ship conversions, 30 Type C4 ship-based General G. O. Squier-class, a class of 84 Victory ship conversions, and a small number of Type-C3-S-A2 ship-based dedicated transports, and 15 classes of attack transports, of which some 400 alone were built.
The modified Liberties were capable of transporting up to 450,[5] 550,[6] or 650[7] (sources vary) troops or prisoners-of-war. Modifications included installation of bunks stacked five deep on the forward tweendeck, additional shower and head facilities, two additional diesel-powered generators,[6] and installation of two more Oerlikon 20-mm automatic cannons.[5][6][8][9]
A class of Victory ship-based dedicated troopship was developed late in World War II. A total of 84 such VC2-S-AP2 hull conversions was completed.[10][11][12][13][14]
A class of Type C3 ship – comprising mainly C3-S-A2 and C3-S-A3 hulls – was also converted to dedicated troopships, capable of carrying 2,100 troops,[15] was also developed.
At least 15 classes of attack transport, consisting of at least 400 ships specially equipped for landing invasion forces rather than general troop movement.
Designation
The designation HMT (Her/His Majesty's Transport) would normally replace RMS (Royal Mail Ship), MV (Motor Vessel) or SS (Steamship) for ships converted to troopship duty with the United Kingdom's Royal Navy. The United States used two designations: WSA for troopships operated by the War Shipping Administration using Merchant Marine crews, and USS (United States Ship) for vessels accepted into and operated by the United States Navy. Initially, troopships adapted as attack transports were designated AP; starting in 1942 keel-up attack transports received the designation APA.
"HMT" was also used, for a while, to designate "Hired Military Transport."[16][17]
Post-World War II
In the era of the Cold War, the United States designed the United States ship so that she could easily be converted from a liner to a troopship, in case of war. More recently, Queen Elizabeth 2 and Canberra were requisitioned by the Royal Navy to carry British soldiers to the Falklands War.[18] By the end of the twentieth century, nearly all long-distance personnel transfer was done by airlift in military transport aircraft.
↑ "HAER for Private Frederick C. Murphy"(PDF). United States Maritime Administration. Archived from the original(PDF) on 9 May 2013. Retrieved 6 August 2013. "In the summer of 1945, eighty-four VC2-S-AP2 Victory ships, including the Maritime Victory, were converted into troopships by MARITIME VICTORY the U.S. Maritime Commission in preparation for an assault on the Japanese home islands. The ship made several crossings of the Atlantic Ocean and was used to repatriate American troops from Europe after World War II. pp. 1–2
The Victory ship was a class of cargo ship produced in large numbers by North American shipyards during World War II to replace losses caused by German submarines. They were a more modern design compared to the earlier Liberty ship, were slightly larger and had more powerful steam turbine engines, giving higher speed to allow participation in high-speed convoys and make them more difficult targets for German U-boats. A total of 531 Victory ships were built in between 1944 and 1946.
Liberty ships were a class of cargo ship built in the United States during World War II under the Emergency Shipbuilding Program. Although British in concept, the design was adopted by the United States for its simple, low-cost construction. Mass-produced on an unprecedented scale, the Liberty ship came to symbolize U.S. wartime industrial output.
Amphibious cargo ships were U.S. Navy ships designed specifically to carry troops, heavy equipment and supplies in support of amphibious assaults, and to provide naval gunfire support during those assaults. A total of 108 of these ships were built between 1943 and 1945—which worked out to an average of one ship every eight days. Six additional AKAs, featuring new and improved designs, were built in later years. They were originally called Attack Cargo Ships and designated AKA. In 1969, they were renamed as Amphibious Cargo Ships and redesignated LKA.
Attack transport is a United States Navy ship classification for a variant of ocean-going troopship adapted to transporting invasion forces ashore. Unlike standard troopships – often drafted from the merchant fleet – that rely on either a quay or tenders, attack transports carry their own fleet of landing craft, such as the landing craft, vehicle, personnel (LCVP) or Higgins boat.
Haskell-class attack transports (APA) were amphibious assault ships of the United States Navy created in 1944. They were designed to transport 1,500 troops and their combat equipment, and land them on hostile shores with the ships' integral landing craft.
USS Guilford (APA-112) was a Bayfield-class attack transport in service with the United States Navy from 1945 to 1946. She was sold into commercial service in 1947 and was scrapped in 1976.
The Bayfield-class attack transport was a class of US Navy attack transports that were built during World War II.
The Frederick Funston-class attack transport was a class of two US Navy attack transports. They saw service in World War II and later in the Korean War.
The Windsor-class attack transport was a class of nine US Navy attack transports. Ships of the class saw service in World War II.
USS Crescent City (AP-40/APA-21) was the lead ship of the Crescent City-class attack transports that served with the US Navy during World War II. The ship was built as the cargo and passenger liner Delorleans for the Mississippi Shipping Company's Delta Line. After brief commercial operation the ship was among 28 vessels requisitioned in June 1941 for the Navy and the Army. The Navy renamed the ship Crescent City, a popular nickname for New Orleans, Louisiana, upon commissioning 10 October 1941. The ship was decommissioned and laid up in 1948 before being loaned to the California Maritime Academy to serve as a training ship 1971–1995 and then transferred to a foundation in a failed art colony project. The ship left California for Texas scrapping in 2012.
The Crescent City-class attack transport was a class of U.S. Navy attack transports that saw service in World War II and the Korean War. There were four ships in the class: USS Crescent City, USS Charles Carroll, USS Monrovia, and USS Calvert.
USS Leonard Wood (APA-12) was built by Bethlehem Shipbuilding Corporation and launched 17 September 1921 at Sparrows Point, Maryland as Nutmeg State, an Emergency Fleet Corporation Design 1029 ship intended as a World War I troop transport, but redesigned upon the armistice as a passenger and cargo ship and completed as Western World for delivery to the United States Shipping Board. The ship's acceptance on 5 May 1922 and delivery on 9 May 1922 marked the completion of the wartime shipbuilding program of the Emergency Fleet Corporation and the Shipping Board.
SS President Roosevelt was an ocean liner in service in the 1920s and 1930s. Originally built as a Harris-class attack transport towards the end of World War I, she entered commercial service after her completion. Having been built as Peninsula State, she was soon renamed President Pierce and then President Roosevelt. Requisitioned for service as a troopship with the US Navy during World War II, she was renamed USS Joseph T. Dickman (APA-13) and served in the Atlantic and Pacific theaters, being scrapped postwar in 1948.
The Harris-class attack transport was a class of US Navy attack transport which saw service in World War II. The purpose of any attack transport was to deliver troops and their equipment to hostile shores in order to execute amphibious invasions using an array of smaller integral landing craft. Being intended to serve in forward combat areas, these ships were well armed with antiaircraft guns to protect itself and its vulnerable cargo of troops from air attack in the battle zone.
The McCawley-class attack transport was a class of US Navy attack transport built in 1928 that saw service in World War II.
The President Jackson-class attack transport was a class of seven US Navy attack transport that saw service in World War II.
The Type C4-class ship were the largest cargo ships built by the United States Maritime Commission (MARCOM) during World War II. The design was originally developed for the American-Hawaiian Lines in 1941, but in late 1941 the plans were taken over by the MARCOM.
SS Hagerstown Victory was a Victory ship-based troop transport built for the U.S. Army Transportation Corps (USAT) late in World War II under the Emergency Shipbuilding program. It saw service in the European Theater of Operations during 1945 and in the immediate post-war period repatriating U.S. troops. Hagerstown Victory was one of 97 cargo Victory ships converted to a troopship.
The Type P1 ship is a United States Maritime Administration (MARAD) designation for World War II passenger ships. P1 was used in World War II, Korean War and Vietnam War. Type P1 were the smallest of the P-class ships, at 400 to 500 feet long. Two P1-S2-L2 ships were built for the Navy and used as attack transports (APA). Many P1 type ships were built on Type C3-class ship hulls.
The SS Tufts Victory was a class of Victory ship built during World War II under the Emergency Shipbuilding program. She was launched by the California Shipbuilding Company on 2 March 194. The ship was completed and delivered to the wartime operator of all United States oceangoing shipping, the War Shipping Administration (WSA), on 28 March 1945. Tufts Victory, official number 247512, was assigned to American Mail Line, under a standard WSA operating agreement at that time. That agreement continued until the ship's sale in 1947. The ship's United States Maritime Commission designation was VC2-S-AP3, hull number 771. Tufts Victory was converted from a cargo ship to a troopship to bring troops home after the war as part of Operation Magic Carpet.
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